body {
    margin: 0;
    height: 100vh;
}
header {
    line-height: 100px;
    width: 100%;
    height: 100px;
    background-color: #393d49;
}
header a{
    color: #fff;
    float: right;
    margin-right: 20px;
}
.wrapper {
    display: flex;
    width: 100%;
    height: calc(100% - 100px);
}
.sider {
    width: 200px;
    height: 100%;
    background-color: #393d49;
    overflow-y: auto;
}
a {
    cursor: pointer;
}
.container {
    height: 100%;
    flex: 1;
}
.container iframe {
    height: 100%;
    width: 100%;
}